Add link to golden tests smart widgets with di doc in the example docs.

[nikolay-vasilev-prime]

Overview

Closes: 2

Checklist

Implementation

• [ ] Implementation matches ticket acceptance criteria and technical notes
• [ ] Manually tested against Acceptance Criteria
• [ ] UI checked in Light / Dark mode

Stability

• [ ] Checked if changes affect any features and verified affected features work as expected
• [ ] Added unit tests for new code and verified existing tests work as expected

Code quality

• [ ] Updated CHANGELOG.md, README.md and package versions in pubspec.yaml
• [ ] Dependencies are updated to latest versions or new tickets are created if there are breaking changes or deprecations
• [ ] If an unrelated part of the codebase needs to be updated or refactored, create tickets with proposed changes

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 85.81%. Comparing base (d1a84eb) to head (4cd063b). Report is 28 commits behind head on develop.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #756 +/- ## ======================================== Coverage 85.81% 85.81% ======================================== Files 117 117 Lines 2531 2531 ======================================== Hits 2172 2172 Misses 359 359 ```

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[nikolay-vasilev-prime]

@DDavidPrime will take it for now.